杭电2002

注意PI是3.1415927

#include<iostream>#include<iomanip>#define PI 3.1415927using namespace std;int main(){    double r,v;    while(cin>>r)    {        v=4.0/3*r*r*r*PI;        cout<<setiosflags(ios::fixed)<<setprecision(3)<<v<<endl;    }    return 0;}